AC impedance & phasors worksheet with answers

Free printable AC impedance & phasors worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

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1.Easy

A series RC circuit is connected to a 120 V (rms), 200 Hz supply. Find the magnitude of the impedance |Z|.

V = 120 V (rms)f = 200 HzR = 150 ΩC = 10 µF

|Z| = Ω

2.Easy

A series RL circuit is connected to a 24 V (rms), 60 Hz supply. Find the magnitude of the impedance |Z|.

V = 24 V (rms)f = 60 HzR = 30 ΩL = 250 mH

|Z| = Ω

3.Medium

A series RLC circuit is connected to a 100 V (rms), 200 Hz supply. Find the rms current I.

V = 100 V (rms)f = 200 HzR = 50 ΩL = 150 mHC = 2.2 µF

I = A

4.Medium

A series RLC circuit is connected to a 24 V (rms), 50 Hz supply. Find the rms current I.

V = 24 V (rms)f = 50 HzR = 10 ΩL = 200 mHC = 22 µF

I = A

5.Hard

A series RLC circuit is connected to a 10 V (rms), 60 Hz supply. Find the rms voltage V_C across the capacitor.

V = 10 V (rms)f = 60 HzR = 60 ΩL = 20 mHC = 10 µF

V_C = V

6.Hard

A series RLC circuit is connected to a 12 V (rms), 60 Hz supply. Find the rms current I.

V = 12 V (rms)f = 60 HzR = 100 ΩL = 250 mHC = 4.7 µF

I = A

Answer key

1. |Z| = 169.8 Ω
2. |Z| = 98.91 Ω
3. I = 0.5547 A
4. I = 0.291 A
5. V_C = 10.02 V
6. I = 0.02497 A

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